Mammillaria discolor var. albida (Haage ex Pfeiff.) Salm-Dyck, Cact. Hort. Dyck., ed. 1844: 11. 1845 Mammillaria discolor var. albida (Haage ex Pfeiff.) Salm-Dyck, Cact. Hort. Dyck., ed. 1844: 11. 1845is new combination for Mammillaria albida Haage ex Pfeiff., Enum. Diagn. Cact.: 28. 1837Taxon for this nameMammillaria discolor var. albida (Haage ex Pfeiff.) Salm-Dyck